Kevin Spacey has joked that he attempted to run through walls while making his latest film The Men Who Stare At Goats in the Caribbean.

Adapted from journalist Jon Ronson's book, the movie centres on a US military group who claim to have psychic powers. General Hopgood, played by Stephen Lang, believes he has the ability to walk through solid objects.

"I can admit I ran into a lot of walls in Puerto Rico and I never got through one of them!" Spacey said at the film's London Film Festival press conference.

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Ronson explained that while researching the book, he interviewed a soldier who said that he was a "wall-walker".

"The main wall-walker was going through a messy divorce at the time and he subsequently told me that one time he turned up with a bruised noise," said Ronson. "He decided that if anyone asked he would say it was domestic abuse."

Star George Clooney said that some events were fabricated for the movie, though many of the more outlandish psychic claims are true.

"There are things that are made up but the wackiest things are actually the real ones," he noted. "When you read the book and read about them trying to run through walls they really did, they believed they could."